In Korea in the early 1800s, news from the countryside reached the king by means of signal fires. On one mountaintop after another, a fire was lit when all was well. If the king did not see a fire, that meant trouble, and he would send out his army. When his father is unable to light the fire one night, young Sang-hee must take his place. Sang-hee knows how important it is for the fire to be lit, but he wishes that he could see soldiers just once.